Butterflies of Madison County - Presents photos and species accounts of butterflies found within the county. www.npwrc.usgs.gov/resource/distr/lepid/bflyusa/chklist/states/counties/oh_97.htm
Madison Soil and Water Conservation District - Agency responsible for the protection of natural resources within the county that assists landowners in planning and applying conservation practices on their land. www.mswcd.org
